US
UK
Taiwan
China
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
Document 1308-1
Document 1308-1 Revised 05/06/16
Coupled Inductors MSD1514
L1 L2
–
–
D
C
C
Typical Flyback Converter
V
OUT
IN
SW
L1
L2
+
–
D
D
C
C
SW
Typical Buck Converter with auxiliary output
V
OUT
V
OUT
AU
V
IN
V
OUT
V
IN
L1
L2
Q
C1
D
Typical SEPIC schematic
V
OUT
V
IN
L1
L2
Q
C1
C
C
D
• Excellent coupling coefficient (k ≥ 0.97)
• Ideal for use in a variety of circuits including flyback, multi-
output buck, SEPIC, Zeta, and Ćuk.
• High inductance, high efficiency and excellent current handling.
• In SEPIC topologies, the required inductance for each winding
is half the value needed for two separate inductors, allowing
selection of a part with lower DCR and higher current handling.
Core material Ferrite
Core and winding loss Go to online calculator
Environmental RoHS compliant, halogen free
Terminations RoHS compliant matte tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight: 9.0 – 11.8 g
Ambient temperature –40°C to +85°C with (40°C rise) Irms current.
Maximum part temperature +125°C (ambient + temp rise).
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Winding to winding isolation (hipot) 500 Vrms
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 175/13″ reel; Plastic tape: 32 mm wide, 0.5 mm thick,
24 mm pocket spacing, 14.3 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
Document 1308-2
US
UK
Taiwan
China
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
Document 1308-2 Revised 05/06/16
MSD1514 Coupled Inductors
SRF Coupling Leakage
Isat (A)
5
Irms (A)
Inductance
2
DCR (Ohms)
3
typ
4
coefficient inductance 10%
20%
30% both one
Part number
1
(µH) typ max (MHz) typ typ (µH) drop drop drop
windings
6
winding
7
MSD1514-252ME_ 2.5 ±20% 0.010 0.012 34.0 0.97 0.20 25.0 28.0 30.5 5.1 7.8
MSD1514-472ME_ 4.7 ±20% 0.012 0.014 25.0 0.98 0.20 19.5 21.8 23.7 4.5 7.6
MSD1514-103ME_ 10 ±20% 0.015 0.018 16.5 0.99 0.40 13.4 15.0 16.2 4.0 6.8
MSD1514-123ME_ 12 ±20% 0.018 0.022 14.5 0.99 0.40 12.2 13.7 14.8 3.7 6.6
MSD1514-153ME_ 15 ±20% 0.024 0.028 11.0 >0.99 0.42 10.9 12.2 13.3 3.4 5.8
MSD1514-223ME_ 22 ±20% 0.031 0.036 10.0 >0.99 0.45 9.00 10.1 11.0 3.0 5.1
MSD1514-273ME_ 27 ±20% 0.034 0.039 8.50 >0.99 0.45 8.14 9.13 9.90 2.95 4.7
MSD1514-333ME_ 33 ±20% 0.045 0.052 7.20 >0.99 0.45 7.40 8.20 9.00 2.55 3.9
MSD1514-473ME_ 47 ±20% 0.065 0.075 5.60 >0.99 0.55 6.20 6.90 7.50 2.20 3.45
MSD1514-683ME_ 68 ±20% 0.078 0.090 5.20 >0.99 0.55 5.10 5.70 6.20 2.00 3.20
MSD1514-104KE_ 100 ±10% 0.115 0.126 3.80 >0.99 0.55 4.20 4.75 5.15 1.65 2.50
MSD1514-224KE_ 220 ±10% 0.261 0.287 2.30 >0.99 0.70 2.85 3.20 3.50 1.10 1.70
MSD1514-334KE_ 330 ±10% 0.334 0.367 2.10 >0.99 0.80 2.33 2.61 2.83 0.98 1.55
MSD1514-474KE_ 470 ±10% 0.500 0.550 1.65 >0.99 1.2 1.95 2.20 2.40 0.77 1.30
MSD1514-105KE_ 1000 ±10% 1.12 1.25 1.10 >0.99 2.0 1.34 1.50 1.63 0.55 0.77
1. When ordering, please specify termination and packaging codes:
MSD1514-105KED
Termination: E = RoHS compliant matte tin over nickel over phos bronze.
Special order: Q = RoHS tin-silver-copper (95.5/4/0.5)
or P = non-RoHS tin-lead (63/37).
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (175 parts per full reel).
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge),
use code letter D instead.
2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms,
0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads
are connected in parallel, inductance is the same value. When leads
are connected in series, inductance is four times the value.
3. DCR is for each winding. When leads are connected in parallel, DCR is
half the value. When leads are connected in series, DCR is twice the value.
4. SRF measured using an Agilent/HP 4191A or equivalent. When leads
are connected in parallel, SRF is the same value.
5. DC current at which the inductance drops the specified amount from its
value without current. It is the sum of the current flowing in both windings.
6. Equal current when applied to each winding simultaneously that
causes a 40°C temperature rise from 25°C ambient.
Click for temperature derating information.
7. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. This information is for reference
only and does not represent absolute maximum ratings.
Click for temperature derating information.
8. Electrical specifications at 25°C.
Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.”
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Coupled Inductor Core and Winding Loss Calculator
This web-based utility allows you to enter frequency, peak-to-peak
(ripple) current, and Irms current to predict temperature rise and overall
losses, including core loss. Go to online calculator.
Document 1308-3
US
UK
Taiwan
China
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
Document 1308-3 Revised 05/06/16
MSD1514 Coupled Inductors
Recommended
Land Pattern
0.220
5,6
0.074
1,9
0.331
8,2
0.130
3,3
0.012
0,30
14
2
3
0.236
6,0
0.311
7,9
0.165
4,2
0.091
2,3
14
2
3
0.559
14,20
max
1 2 3
X
0.590 ±0.197
15,0 ±0,50
Dash number
Dot indicates pin1
Internal code
15,0 ±0,50
3
1
L1
L2
11:
*
For optional tin-lead and tin-silver-copper
terminations, dimensions are for the mounted
part. Dimensions before mounting can be
an additional 0.012 inch (0,3 mm).
*
min
Typical L vs FrequencyTypical L vs Current
Dimensions are in
inches
mm
100 µH
1000 µH
47 µH
22 µH
10 µH
4.7 µH
470 µH
220 µH
1
10
100
1000
0.1 1
10010
100 µH
1000 µH
47 µH
22 µH
10 µH
4.7 µH
470 µH
220 µH
1
10
100
1000
0.1 1
10010
